thumb|José Rolón José Rolón (1876–1945) was a Mexican composer, a student of Nadia Boulanger.Harvard Dictionary of Music -Willi Apel - 1969 Page 526 0674375017 Jose Rolon (1883-1945), a disciple of
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe37e167b3813207d411da636280b10e0144b065de4cc9649e5ec864fb9d373. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e5e509a-b2c1-4489-947c-224f427893f9.json and https://artists.proofprofile.net/proofs/artist/6e5e509a-b2c1-4489-947c-224f427893f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Música de Chávez, Márquez, Moncayo, Revueltas y Rolón
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d5cb8382441a9a9b8e74f088e4f79ed58962e57f04e4f62616c93ad2305574. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831300384.
Concierto Para Piano Y Orquesta: I Allegro Energico, II Poco Lento - Andante - Piu Mosso Agitato, III Allegro Con Fuoco: I Allegro Energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c7c59f214278a02c8e14f95ea6aea86d54a78126bf4dc8e028c5372e9f9332. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF019502440.